165705045 has 16 divisors (see below), whose sum is σ = 289230912. Its totient is φ = 80341760.

The previous prime is 165705037. The next prime is 165705049. The reversal of 165705045 is 540507561.

165705045 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 165705045 - 2³ = 165705037 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a junction number, because it is equal to n+sod(n) for n = 165704997 and 165705015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165705049) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 501972 + ... + 502301.

It is an arithmetic number, because the mean of its divisors is an integer number (18076932).

Almost surely, 2^165705045 is an apocalyptic number.

165705045 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

165705045 is a deficient number, since it is larger than the sum of its proper divisors (123525867).

165705045 is a wasteful number, since it uses less digits than its factorization.

165705045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1004292.

The product of its (nonzero) digits is 21000, while the sum is 33.

The square root of 165705045 is about 12872.6471636567. The cubic root of 165705045 is about 549.2607644405.

The spelling of 165705045 in words is "one hundred sixty-five million, seven hundred five thousand, forty-five".